9-1 餐馆
class Restaurant():
def __init__(self, restaurant_name, cuisine_type):
self.restaurant_name = restaurant_name
self.cuisine_type = cuisine_type
def describe_restaurant(self):
print("Restaurant name: " + self.restaurant_name)
print("Cuisine type: " + self.cuisine_type)
def open_restaurant(self):
print(self.restaurant_name + " is open.")
def f(restaurant):
restaurant.describe_restaurant()
restaurant.open_restaurant()
print()
a = Restaurant("McDonald's", "fast food")
b = Restaurant("KFC", "fast food")
c = Restaurant("Pizza Hut", "pizza")
f(a)
f(b)
f(c)
9-5 尝试登录次数
class User():
def __init__(self, user_name, login_attempts=0):
self.user_name = user_name
self.login_attempts = login_attempts
def increment_login_attempts(self):
self.login_attempts += 1
def reset_login_attempts(self):
self.login_attempts = 0
def print_login_attempts(self):
print(self.login_attempts)
user = User("Eric")
for i in range(0, 10):
user.increment_login_attempts()
user.print_login_attempts()
user.reset_login_attempts()
user.print_login_attempts()
9-7 管理员
class User():
def __init__(self, user_name, login_attempts = 0):
self.user_name = user_name
self.login_attempts = login_attempts
def increment_login_attempts(self):
self.login_attempts += 1
def reset_login_attempts(self):
self.login_attempts = 0
def print_login_attempts(self):
print(self.login_attempts)
class Admin(User):
def __init__(self, user_name, login_attempts = 0):
super().__init__(user_name, login_attempts)
self.priviledges = ["can add post", "can delete post", "can ban user"]
def show_priviledges(self):
print(self.priviledges)
admin = Admin("Dog Admin")
admin.show_priviledges()
9-14 骰子
from random import randint
class Die():
def __init__(self, sides = 6):
self.sides = sides
def roll_die(self):
print(randint(1, self.sides))
def roll_ten_times(die):
for i in range(0, 10):
die.roll_die()
print()
die = Die();
roll_ten_times(die)
die = Die(10)
roll_ten_times(die)
die = Die(20)
roll_ten_times(die)